Portable crane.



J. J. SCHULZ. PORTABLE CRANE. APPLICATION FILED AUG-2], I917- Paterited J an. 22, 1918.

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JOHN J. SGHULZ, F SOUTHSAN FRANCISCO, CALIFORNIA, ASSIGNOR TO ANNA SCHULZ, OF SOUTH SAN FRANCISCO, CALIFORNIA.

PORTABLE CRANE.

Application filed August 27, 1917.

To all whom it may concern.

Be it known that I, JOHN J. SoHuLz, a citizen of the United States, and a resident of South San Francisco, in the county of San Mateo, State of California, have invented certain new and useful Improvements in Portable Cranes; and I do hereby declare the following to be a full, clear, concise, and exact description of the same.

The invention is an improved portable crane, particularly useful in a rolling mill for conveying steel billets from one rolling machine to another. However, the invention may be used for other purposes.

In this specification and the annexed drawing, I illustrate my invention in the form which I consider the best, but I do not limit myself to such form because this invention may be embodied in other forms and it is to be understood that in and by the claims following the description herein, I intend to cover my invention in whatever form it may be embodied.

Referring to the drawing:

Figure 1 is a side elevation of my improved portable crane.

Fig. 2 is a front end elevation of the upper part of the crane.

In the drawing, 1 indicates a truck comprising a base 2 and casters 3 upon which said base is mounted. On the base 2 is mounted a turntable 4:, comprising a stationary member 5 secured to the base and a rotatable member 6, rotatably mounted on said stationary member. On the rotatable member of the turntable is secured a standard 7 formed with a vertical slot 8. A gear 10 is journaled upon the standard 7 within the slot 8 and meshes with a gear 11 mounted within the lower part of said slot on shaft 12 suitably journaled in the standard. A gear 13 is secured on the outer end of the shaft 12 at one side of the standard 7 and meshes with an idler 1 1 suitably journaled on the side of the standard. The idler 14L meshes with the pinion 15 on the drive shaft 16 of a motor 17 mounted on a bracket 18 secured to the side of the standard 7.. The motor drives the gear 10 through the medium of pinion 15, gear 14L, gear 13, shaft 12 and gear 11. A carrier 20 is formed With a segment 21 which extends through the upper part of the slot 8 and has an internal segmented gear 22 thereon which meshes with the upper part of gear 10 which gear Specification of Letters Patent.

Patented Jan. as, rare.

Serial No. 188,333.

supports the carrier on the standard 7. The radius of the segmented gear 22 is greater than the radius of the gear 10 which enables the gear 10 upon rotating, to move the carrier forwardly and backwardly with relation to the standard 7 and truck 1 and enables the carrier 20 to turn upon the gear to swing the forward end of the carrier upwardly or downwardly. A roller 25 is journaled in crossheads 26 slidably mounted in vertical slots 27 in the upper part of the standard 7, which crossheads are pressed downwardly by springs 27 mounted upon said crossheads and upon brackets 28 secured to the top of the standard 7, the action of the springs maintaining the roller 25 in engagement with the upper face of the segment and holding the segmental gear 22 in tensional engagement with gear 10. The rotatable member 6 of the turntable 4.- is formed With a gear 30, with which meshes a pinion 31 on shaft 32 journaled in a bearing 33 on the truck base 2. A gear 3a is secured on the shaft 32 with which meshes a pinion 35 on the shaft 36 of motor 37 which motor is mounted on the truck base 2. The standard 7 and the parts mounted thereon including the carrier are turned by the motor 37 through the medium of pinion 35, gear 3 1, pinion 31, and gear 30. Tongs 40 are placed on the forward end of the carrier 20 for grasping and holding the billets 11 so that the carrier 20 may carry the billets from one rolling machine to another. The tongs comprise a pair of jaws et2 and 13 and arms 11 and extending respectively from said jaws, the tongs being pivoted by pivot 46 to a bracket 47 depend ing from the forward end of the carrier 20. The jaws of the tongs are normally held open by a spring 18 which bears againstthe inner side of the arms 14 and 45. Two cables 19 and 50 are connected to the upper ends of the arms 1 and 15 which cables pass over sheaves 51 mounted on the forward end of the carrier 20 and are con nected at 52 to a cable 53. The cable 53 passes over sheaves 54 and 55 mounted on the carrier, through the slot 8 in the standard 7 and is connected to an operating lever 56 mounted on the rear end of the carrier 20. A locking means 57 is provided for locking the lever 56 at the proper position for holding the tongs 10 closed through the medium of the cables 53 and 19 and 50 so that the tongs will hold the billets firmly A weight is placed on the rear end of the carrier 20' to balance the carrier.-

It will be apparentthat the carrier may be moved forwardly and backwardly by the motor 17, rotated horizontally :by the motor 37 andswung vertically :up and down about the gear 10 so that the tongs may grasp and convey the billets from one rolling machine to another. The open jaws of the tongs whenlowered over the billets position themselves properly for gripping the billets.

Having described my invention, I claim as new, and desire to secure by Letters Patent:

1. In a portable crane, supporting means, a gear mounted onsaid supporting means, a carrier, a segmental gear on said carrier, meshing with and supported by said gear, means for rotating said gear to move said carrier forwardly and backwardly.

2. In a portable crane, supporting means, a gear mounted on said supporting means, a carrier, a segmental gear on said carrier meshing with and supported by said gear, means for rotating said gear to move said carrier forwardly and backwardly, and said carrier being mounted to swing vertically about said gear.

3. In a crane, supporting means, a gear mounted on said supporting means, a carrier, a segmental gear on said carrier meshing with said gear, means for rotating said gear to move said carrier forwardly and backwardly. a

4. A crane comprising supporting means, a gear mountedon said supporting means, a carrier, a segmental gear on said carrier meshing with said gear, the radius of said segmental gear being greater than the radius of saidgear to permit forward and backward movement of the .carr'aerupon rotation of said gear and to permit swinging movement of the zearrier'about said gear.

a .A .eranecomprising a support, a gear mounted on said support, a carrier, a segmental gear on said carrier meshing withv said gear for moving sald carrlerforwardly and backwardly and-for permitting vertical swinging movement of said carrier.

6. A portable crane',--com,prising support ing means, a gear mounte'dqon saidsupport,

ing means, a carrier, a segmental gear on said carrier, meshing with said gear,and a roller engaging said carrier and maintaining said segmental gear in engagementwith said gear 7 i i f In a portable crane, supporting means, a gear mounted on saidsupporting means, a carrier, a segmental gear on said carrier meshing with said gear, means for preventing disengagement of said segmental gear and said gear, and means forrotating said gear.

SyIn a portable crane, supporting means,

JOHN J. soriULz.

In presence of A.-J-. I'IENRY,

LINCOLN JoirNsoN.

Copies o1 this patent may be obtained for five cents each, by addressingtlleCommissioner of Patents,

Washington, D. C. 

